On Thursday, June 08, 2017 05:07:40 PM Alan Cox wrote: > > > On Jun 8, 2017, at 2:37 PM, John Baldwin <j...@freebsd.org> wrote: > > > > On Thursday, June 08, 2017 12:55:45 PM Bryan Drewery wrote: > >> On 6/8/17 12:18 PM, John Baldwin wrote: > >>> Author: jhb > >>> Date: Thu Jun 8 16:18:41 2017 > >>> New Revision: 319702 > >>> URL: https://svnweb.freebsd.org/changeset/base/319702 > >>> > >>> Log: > >>> Fix an off-by-one error in the VM page array on some systems. > >>> > >>> r31386 changed how the size of the VM page array was calculated to be > >>> less wasteful. > >> > >> r313186 > > > > Oops. FWIW, this commit fixes a reliable panic booting mips and mips64 > > kernels under qemu. Adrian also reported the same panic on real mips > > hardware. > > > > Any architecture on which we don’t have superpage reservations enabled could > experience the panic at boot time. Amd64, arm, arm64, i386, and sparc64 > would never panic because of the memory allocated for the reservation array.
Even then it seems to not be guaranteed. The original change has been in CheriBSD for a while, and we have not seen any panics on boot under qemu as I saw with plain FreeBSD probably due to slightly different early memory allocations. -- John Baldwin _______________________________________________ svn-src-all@freebsd.org mailing list https://lists.freebsd.org/mailman/listinfo/svn-src-all To unsubscribe, send any mail to "svn-src-all-unsubscr...@freebsd.org"
